function verification(){
	var Mwrong = document.getElementById("Mwrong");
	var Musername = document.getElementById("userid");
	var Mpassword = document.getElementById("password");
	if(Musername.value == ""){
		Mwrong.style.visibility = "";
		Mwrong.style.display = "";
		Mwrong.innerHTML = "用户名为空";
		return false;
	}
	else{
		Mwrong.style.visibility = "visible";
		Mwrong.style.display = "none";
		Mwrong.innerHTML = "";
			if(Mpassword.value == ""){
				Mwrong.style.visibility = "";
				Mwrong.style.display = "";
				Mwrong.innerHTML = "密码为空";
				return false;
			}
			else{
				Mwrong.style.visibility = "visible";
				Mwrong.style.display = "none";
				Mwrong.innerHTML = "";
				return true;
			}
	}
}
